Intel G31 User Manual page 12

(2) USB Port Headers (9-pin) :
USB2 / USB3
These headers are used for connecting the
additional USB port plug. By attaching an
option USB cable, your can be provided
with two additional USB plugs affixed to the
back panel.
(3) Speaker connector: SPEAK
This 4-pin connector connects to the case-mounted speaker. See the figure below.
(4) Power LED: PWR LED
The Power LED is light on while the system power is on. Connect the Power LED
from the system case to this pin.
(5) IDE Activity LED: HD LED
This connector connects to the hard disk activity indicator light on the case.
(6) Reset switch lead: RESET
This 2-pin
case-mounted reset switch for rebooting your
computer without having to turn off your power
switch. This is a preferred method of rebooting
in order to prolong the lift of the system's power
supply. See the figure below.
(7) Power switch: PWR BTN
This 2-pin
case-mounted power switch to power ON/OFF
the system.
(8) FAN Power Headers: SYSFAN1, SYSFAN2
(3-pin), CPUFAN (4-pin)
These connectors support cooling fans of 350mA (4.2 Watts) or less, depending on the fan
manufacturer, the wire and plug may be different. The red wire should be positive, while the
black should be ground. Connect the fan's plug to the board taking into consideration the
polarity of connector.
CPUFAN
4
1
SYSFAN1
SYSFAN2
3 1
FAN Power Headers
connector connects
connector connects
3 1
USB2
Pin 1
USB Port Headers
to the
Pin 1
Pin 1
to the
System Case Connections
10
USB3
Pin 1
PWRLED
JW FP
SPEAK
Pin 1